﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class StringUtil
    {
        public static void Text()
        {
            bool a;
            Console.WriteLine("请输入一个字符串");
            string b = Console.ReadLine();
            if (b == null || b == "" || b == "  ")
            {
                a = true;
            }
            else
            {
                a = false;
            }Console.WriteLine(a);
        }
    }
}
